leavitt



omiten srnrns PATENT orrron.

RUFUS S. LEE AND WM. D. LEAVITT, OF CINCINNATI, OHIO.

ROCKER-BOX FOR SAW-SHAFTS.

Specification of Letters Patent No. 23,377, dated March 29, 1859.

To all 'whom it may concern:

Be it known that we, RUFUS S. LEE and IIL-MAM D. LEAVITT, of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in what we term Lateral Vibrating Rocker-Boxes for Hanging Saw-Shafts in; and we do hereby declare the following to be a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying. drawings, making a part of this specification, 1n which- Figure I, represents an end view of the rocker box. Fig. 2, represents a longitudinal vertical section taken through the red line m, a, of Fig. l. Fig. 3, represents a topplan of the underside of the rocker box, showing the spring and rollers in place. Fig. 4, represents a cross section throughthe inner box, and its connection with the spring.

Similar letters of reference where they occur in the several figures denote like parts in all of them.

In using circular saws, it is imperative that their shafts should have some end motion. But it is also necessary that this end motion should be somewhat restrained, to keep the saw from leaving too far the path of its kerf.

Our invention has for its object, the making of a rocker box, so that the saw shaft shall not be cramped therein-and giving to the inner box thereof end play on friction rollers, but restrained by a spring which returns it to its original position when the strain is removed from it.

IVe are aware that, end motion has been given to a. saw shaft; we are also aware that, saw shafts have been hui'ig in rocker boxes; and that saw shafts have been made to yield endwise against a spring. IVe do not claim either of these things individually, but a cheap, efficient, and compact form of rocker box by which all the necessary motions are effected.

Our invention may, therefore, be said to consist, in combining with a rocker box, an interior box that has end motion thereinfriction rollers, and against or with a spring,

also arranged within the rocker box, as will now be described.

A, represents an iron base or frame in which the box B, is hung by screw pivots C, C, so that the box may freely play or rock on said pivots. The -box B, is divided horizontally into two partsviz: a cap a, and a base b-the cap being held to the base by set screws c. Within this outer box B, there is another box D, which may be made of box metal of any of the known kinds. This box D, is also divided horizontally into two sections d a, but with a lap or broken joint as seen at f, Fig. 2. This inner box is longer than the outer one and has flanges (7, g, upon both its ends, so as to allow it to have a certain extent of end motion and then be held from moving any farther by said flanges coming against the ends of the outer box. This inner box D, supports the shaft, which shaft should also have collars upon it, coming close up to the ends of said inner box.

In the base or bed portion Z), of the outer box there are two friction rollers 7L, upon which the inner box rests. And there is also in this bed portion b a spring which is held loosely at its center by the two approaching ribs 7c 7c, as seen in Fig. 3. On the bottom of the part c, of the inner box, there are projections m, which are slotted to receive the points of the spring c'. So that when the inner box has any end strain upon it, it will move against the action of said spring--and when such end strain is ren moved, the spring will return the box again to its original position. By this means provision is made for allowing the saw shaft. end play when the log being sawn springs on its carriage which it is very liable to do. The whole box being hung on pivots, it freely rocks to accommodate itself to any transverse cramping of the saw shaft.

a, is an oil cup for oiling the journal of Y the saw shaft.

Having thus fully described the nature and object of our invention, what we cla-im therein as new and desire to secure by Letters Patent is:

l. So connecting the inner to the outer box through the medium of a spring, as that said inner box or bearing, may have end motion inner boX to move on substantially as set 1n the outer one agalnst the aetlon of sand forth and descrlbed.

spring, substantially as described, and for RFUS S. LEE.

the purpose set forth. WILLIAM D. LEAVITT.

2. And We also claim in combination with Witnesses:

the elastic or spring Connection between the B. J. DOUGLAS, Y

inner and outer box, the rollers it, h or the JAMES CLARKSON. 

